The annual weather cycle in the Côte d’Azur is characterized by
a sunny and almost dry period extending from spring to late summer
with most of the annual rainfall occurring in autumn (October–
November) and early spring (March). In the spring of 2007,
the rain was scarce and caused no noticeable rise in freshwater input
into the sewage pipe (Table 1). In contrast, autumnal rain
raised the output approximately 24%. However, regardless of the
rain levels, the sewage outflow peak occurred in August, during
the height of the tourist season (over 5900 m3/d).